....CHDEDK..FRGB..ITLI....SE......................J0508735EUROPEAN PATENT APPLICATIONA319930331EP92303094.419920408enenen91179919910412FI19930331199313199210141992425 5H 01P 1/205 A 5H 01P 1/213 B 5H 01P 1/203 BdeMikrowellenfilterenMicrowave filterfrFiltre hyperfréquence4LK-PRODUCTS OY01242970PAT 91905lk products oyTakatie 6SF-90440 KempeleFITurunen, AimoTarkka-ampujankatu 18 D 3SF-90120 OuluFIFrain, Timothy John00050185Patent Department Nokia Mobile Phones St Georges Court St Georges RoadCamberley, Surrey GU15 3QZGBCHDEDKFRGBITLISE19930331199313

An inexpensive and lightweight filter is made utilizing an electronic device's housing and the printed circuit board (15) upon which electrical components are mounted. The housing has a base, cover and sidewalls (20,21,22) and partitions (18,19) defining a compartment into which is received a portion of the printed circuit board (15). In this portion, finger-like projections (14₁-14₄) are formed to act as filter resonators. The compartment walls define a filter casing, thus forming a filter structure.